(1) common plastic film solar greenhouse with one inclined and one vertical.

1 structure. The span is 6 ~ 8m, and the drop is 2.8 ~ 3.5m The back wall is of soil or masonry structure, with a height of 1.8 ~ 2.6m, and the back slope is of grass foil mud (Figure 2).

Schematic diagram of ordinary plastic film solar greenhouse with one inclined and one vertical.

1. Front vertical window 2. Lumbar column 3. Cantilever beam 4 Middle column 5. Roof 6. Rear wall 7. Vent.

2 characteristics. Good lighting, rapid temperature rise, good heat preservation, simple structure, low cost, large space and convenient operation.

(2) Plastic film solar greenhouse in series

1 structure. The span is 7 ~ 8m, and the drop is 2.8 ~ 3.5m The central column is prefabricated with cement, and the back slope is pasted with sorghum straw foil. The back wall is 2 ~ 2.6m high and the back slope length is1.2 ~1.5m.. The front roof is provided with a cross frame of steel pipe or thick bamboo pole with a diameter of 5-7 cm every 3 meters, and an 8 # iron wire is pulled on the cross frame with a spacing of 40 cm. The two ends of the iron wire are fixed on the outer bases of the east and west walls. A thin bamboo pole is sleeved on the iron wire as a skeleton every 60 cm, covered with plastic film, and then pressed on it. The iron wire is fixed on the skeleton without pressing the film wire (Figure 3).

Fig. 3 Schematic diagram of plastic film solar greenhouse

1. Front column 2. Front vertical window 3. The fourth column in the middle. Roof purlin 5. Cross-pull Line 8 and Line 6. Thin bamboo skeleton 7. Outer gables of Line 8. gable

2 characteristics. Good lighting effect, large space, no column in front of the house, convenient operation.

(3) All-steel arch plastic film solar greenhouse

1 structure. Span 6 ~ 7 meters, rising 2.8 ~ 3.2 meters. The back wall is a hollow brick wall with a height of 2.2 meters. Steel skeleton, the upper chord diameter 14 ~ 16 mm, the lower chord diameter 12 ~ 14 mm, and the drawing diameter of 8 ~ 10 mm, are connected by three flower beams horizontally. The arch spacing is 60 ~ 80 cm, the lower end of the arch is fixed on the foundation of the front foot masonry, and the upper end is placed on the back wall. The back length is 1.5 ~ 1.7 m, the back top of the skeleton is paved with wooden boards and grass mud, and the bottom of the back top is paved with slag as insulation layer (Figure 4).

Fig. 4 All-steel arched plastic film solar greenhouse

1. Steel skeleton 2. Exit three. back slope

2 characteristics. There is no column indoors, which is convenient to operate. Permanent greenhouse, durable, good lighting, uniform light distribution, rapid temperature rise, but the cost is higher.